Naslov
The rate controlling step in competitive binding of Pb, Cd and Zn from binary systems onto fixed zeolite bed

Autori
Nuić, Ivona ; Trgo, Marina ; Vukojević Medvidović, Nediljka ; Ugrina ; Marin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the IWA 9th Eastern European Young Water Professionals Conference / Feierabend, M. ; Novytska, O. ; Bakos, V. - Budimpešta : Budapest University of Technology and Economics, Department of Applied Biotechnology and Food Science, 2017, 393-394

ISBN
978-963-313-256-2

Skup
9th Eastern European Young Water Professionals Conference

Mjesto i datum
Budimpešta, Mađarska, 24.05.2017. - 27.05.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
lead, zinc, cadmium, binary systems, zeolite fixed bed, rate controlling step

Sažetak
The rate controlling step in the fixed bed has been qualitatively evaluated by the graphical method and quantitatively determined by calculation of the overall mass transfer coefficient, for binary systems (Pb+Zn) and (Cd+Zn). The overall mass transfer is higher in the (Cd+Zn) system compared to the (Pb+Zn) one for the same experimental conditions. The reason for this is much less pronounced competition between Cd and Zn ions in the (Cd+Zn) binary system compared to Pb and Zn in the (Pb+Zn) binary system, due to similar physical properties of Cd and Zn ions. By increasing the flow rate the increase in the overall mass transfer coefficient has been obtained due to shorter contact time between the solute and zeolite. The mass transfer of Zn ions increases with decreasing Cd or Pb concentrations in the influent, as well as with increased flow rate, since all this contributes to reducing the competition effect.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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